SEED PROPAGATION
Marigold French dwarf crested HAPPY ™ OP Tagetes patula nana REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Detailed, SatinCoat ™
3–4 weeks
1
Yes
3–5 days
68–72 °F (20–22 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm Comments: Very easy to germinate on the bench. If seedlings get stretched, they can be planted deep at transplanting, and new roots will form along the stems. Do not hold too long in the plug tray or stress-induced flowering may occur, and plants will flower before bulking up to a satisfactory size. Happy French Marigold is a genetically compact series, so chemical growth regulators are usually not necessary. Control can also be gained by good moisture management and applications of various growth regulators if needed.
Marigold Interspecific ENDURANCE ™ F1 Tagetes triploid REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
SatinCoat ™
3–4 weeks
1
Yes
3–5 days
68–72 °F (20–22 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm Comments: Very easy to germinate on the bench. If seedlings get stretched, they can be planted deep at transplanting, and new roots will form along the stems. Do not hold too long in the plug tray or stress-induced flowering may occur, and plants will flower before bulking up to a satisfactory size.
Marigold Interspecific ZENITH ™ F1 Tagetes triploid REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Detailed
3–4 weeks
1
Yes
3–5 days
68–72 °F (20–22 °C)
Not required for germination pH: 5.8–6.2
SME 0.5–0.75 mS/cm Comments: Very easy to germinate on the bench. If seedlings get stretched, they can be planted deep at transplanting, and new roots will form along the stems. Do not hold too long in the plug tray or stress-induced flowering may occur, and plants will flower before bulking up to a satisfactory size.
Mimulus MAGIC ™ F1 Mimulus × hybrida REC TRAY FORMS
PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Pelleted
4–5 weeks
1
No
5–7 days
65–68 °F (18–20 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm
Comments: Provide day extension lighting to 14 hours under short days using mum type lights (10 foot candles). Using HID lights can promote too early of flowering.
Nicotiana PERFUME ™ F1 Nicotiana × sandrea REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Pelleted
4–5 weeks
1
No
3–5 days
70–75 °F (21–24 °C)
Required for germination
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
Comments: Cool days with high light will reduce the need to apply plant growth regulators (PGRs).
Nicotiana SARATOGA ™ F1 Nicotiana × alata REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Pelleted
4–5 weeks
1
No
3–5 days
70–75 °F (21–24 °C)
Required for germination
pH: 5.5–5.9 SME 0.9–1.3 mS/cm
Comments: Cool days with high light will reduce the need to apply plant growth regulators (PGRs).
Osteospermum ASTI ™ F1 Osteospermum ecklonis REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray
Raw
4–5 weeks
1
Yes
8–12 days
68–70 °F (21–22 °C)
Not required for germination pH: 5.5–5.9
SME 0.5–0.75 mS/cm Comments: It is very important to spray the plugs with Cycocel ® at 300 ppm about 10 days after sowing to help reduce hypocotyl stretch. Shorter hypocotyls will result in a stronger central stem after transplant and will reduce floppiness in the finished plant.
Pansy COLOSSUS ™ F1 Viola × wittrockiana REC TRAY FORMS PLUG TIME
SEEDS/CELL SEED COVER GERM TIME
SOIL TEMP
GERM LIGHT
MEDIA pH/EC
288-cell tray pH: 5.5–5.9 SME 0.9–1.3 mS/cm Comments: Keep media pH below 5.8 to help avoid Thielaviopsis infections. Under hot temperatures provide lower light levels to reduce heat stress. Do not hold Pansy plugs—transplant before plugs get root bound. Raw, PreNova ™ 2.0 5–6 weeks 1 Yes 5 days 65–68 °F (18–20 °C) Required for germination
G R O W E R S U C C E S S G U I D E 2 0 2 2 – 2 0 2 3 | A N N U A L S
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